Door-check.



PATEN'VI'ED A G.;2Q.[19'07.

G. KEITH. DOOR CHECK. APPLICATION FILED AIIGl 8.,1906.

' 'WITNEBSIEEI JOHN G. KEITH, OF BROOKLYN, NEW YORK.

DOOR-CHECK.

Specification of Letters Patent.

Patented Aug. 20, 1907.

Application filed August 8,1906. Serial No. 829,655.

To all whom it may concern:

Be it known that 1, JOHN G. KEITH, a citizen of the United States,residing at Brooklyn, in the county of Kings and State of New York, haveinvented new and Improved Door-Check, of which the following is aspecification.

This invention relates to mechanism for holding a door in a fixedposition when opened to any desired angle.

"he object of my invention is an increased efficiency in operation andeconomy of construction of such a door check, and to these ends myinvention consists in providing a supporting plate or casing for my doorcheck within or supported by which there may be contained a springoperating to retain the check in either its operative or inoperativeposition.

For reducing the expense of manufacturing and assembling such a doorcheck, I have found it advantageous to form open bearings for the doorcheck lever proper and to provide, preferably a leaf spring of such aconformation and so supported relatively to the check lever proper as tohold the door check positively in its bearings and at the same timeoperating to hold the check in its operative and inoperative position.In such a construction I have found it advantageous to make use of thefriction between a practically fixed spring of the character just abovedescribed and a moving end of the door check lever adapted to be engagedand held by the spring. I also provide a casing having a slot throughwhich an operating knob for the door check may project and suchoperating knob of such a conformation as to permit of the readyassembling of the parts. Although it is not essential, still I preferthat the operating knob be formed integrally with the check lever. Theusual rubber tip for engaging the floor or carpet thereon in such acheckI secure in place by means of a clove-tailed arrangement,-as will beexplained.

Similar letters refer to similar parts throughout the several views.

The accompanying drawings illustrating a door check embodying myinvention are as follows:

Figure 1 shows a view of the lower portion of a door with my checkattached thereto, such check being shown in full lines in its operativeposition as engaging the floor beneath the door, while the inoperativeposithe door, in engagement with which is seen the rubber tip b securedin the lever B, comprising the operative lever of my check. This lever Bcarries trunnions I) seated in open bearings formed in the projectinglugs a formed on the case A. This case A is wedge shaped in generalappearance and has projecting lugs a through which holes are formed toreceive screws, as indicated, for attaching the same to the door. Anopening in the case A is provided near the bottom on one side to receivethe lever B. The lever B terminates at its outer end in the usual knob bcarrying the rubber tip I) which is dove-tailed into such knob If. "helever B extends within the case A and is bifurcated at its inner end andbetween the projections c and 0 thus formed at the inner end of thelever B there is provided a suitable surface for engaging the spring S.

The spring S is formed of a plate of suitably elastic material and bentover and around and secured upon the pin 3 carried by the face of thecase A and is forced in between the pin 3 and the lug c on the inside ofthe case r The spring S operates, as indicated, to force the lever B tothe right, seen in Figs. 1 and 2, and to the left as seen in Fig. 3, andserves thus to keep this lever B seated within the bearings formed forthe trunnions I) carried by such lever B.

On the inner end of the lever B, and preferably formed integrallytherewith, I provide a knob K of such a conformation, as indicated, thatit may be inserted through the slot is in the front side of the case Awhen such lever B is moved to a position nearly or quite tangentialtothe direction of this curved slot, and when the lever B is thereafterturned to a position nearly radial to the slot is, the stem of the knobK may be drawn to the right within the slot is, permitting the trunnionsb on the lever B to pass around the lugs a carried by the case A, whenthe spring S may be inserted in position and then the lever B movedupwardly and forced to the left, as seen in Fig. 1, against the actionof the spring S until the trunnions b carried by the lever B are forcedinto position in the bearings therefor carried by the lugs a and inwhich bearings such trunnions are firmly held seated by the action ofthe spring S in forcing the lever B to the right.

The front of the case A each side of the slot is cooperates with theknob K. and the projection c on the lever B to form a guide for theinner end of the lever B, while the horizontally disposed slot k permitsthe drawing of the lever B to the right so that the trunnions may becarried around and over the lugs a and forced into the bearings carriedthereby. The slot is is in the form of an arc of a circle having itscenter at the trunnions b. For limiting the downward movement of theinner end of the lever B, I provide a step c on the lower corner of thecase A and arranged to be engaged by the projection 0 carried by thelever B. I have sometimes found it desirable to provide a detachableknob K,

as seen in Figs. 4 and 5, threaded 1nto the projection 0 carried by thelever B and having formed integrally therewith the vane k adapted toclose the slot k when the lever B is in its inoperative position. Thisis seen more clearly in Fig. 4, where a part of the lower left handcorner of the case A is shown only in outline.

The operation of my check is as follows: the parts having been assembledin the manner above described and the case A attached to the door D atthe proper height from the floor F thereunder, the outer or left handend of the lever B is forced downwardly by the foot of the operatoragainst the action of the spring S. The conformation and arrangement ofthe parts is such, as will at once be seen, that little effort isrequired to force the right hand end of the lever B downwardly, thespring S serving to hold it in its inoperative position, indicated indotted lines at B in Fig. 1, by the friction thereof against the lefthand and inner end of the lever B. It will be observed that theconformation of the parts is such also that when the outer end ofthe-lever B is held down in a position to check and hold the door, thespring S operates quite strongly to hold it in this position as well bythe direct action of the spring as also by the friction between thespring and the left hand end of the lever B and that some little effortis required to force the knob K downwardly to move the checking lever Bto its inoperative position, free from the floor.

I desire to call attention to the fact that the lever B carries anoperating knob projecting through a slot in the case A, through which itmay be inserted for assembling the parts of my check only by moving thelever B to a position considerably without the normal range of itsoperative positions, and on account of this feature, the operating leverof my check is held seated in its bearings by the actuating spring. Theside of the case around the slot through which the operating knob Kprojects together with such operating knob comprise a means for guidingthe inner end of the checking lever in its operative movements.

What I claim is:

I 1. In a door check, a supporting plate adapted to be attached to thedoor, a check lever pivoted to such plate in an open hearing or openbearings, a spring adapted to hold such lever seated in such bearing orbearings and also adapted to hold such lever in its operative andinoperative positions.

2. In a door check, a case adapted to be attached to a door, a checklever pivoted to such case in an open hearing or open bearings, a springadapted to hold such lever seated in such bearing or bearings and alsoadapted to hold such lever in its operative and inoperative positions,such check lever carrying .an operating knob arranged to pro jectthrough a suitable slot therefor in such case, such knob and the end ofsuch lever to which it is attached cooperating with the side walls ofsuch case about such slot to guide such lever in its movement.

3, In a door check, a case adapted to be attached to a door, a checklever pivoted to such case in an open bearing or open bearings, a springadapted to hold such lever seated in such hearing or bearings and alsoadapted to hold such lever in its operative and inoperative positions, aslot in the wall of such case, an operating knob formed integrally withsuch lever and adapted to be inserted through such slot only when suchlever occupies a position angular-1y without the range of the normalmovement of such lever when seated in its bearings.

-L. In a door check. a case adapted to be attached to a door, a checklever pivoted to such case in an open hearing oropen bearings, a springadapted to hold such lever seated in such hearing or bearings and alsoadapted to hold such lever in its operative and inoperative positions, aslot in the wall of such case, an operating knob formed integrally withsuch lever and adapted to be inserted through such slot only when suchlever occupies a position angular-1y without the range of the normalmovement of such lever when seated in its bearings, such knob and 1e vercooperating with the side wall of such case about such slot to guidesuch lever in its movement.

JOHN G. KEITH.

Witnesses .IULIUs Ln GRANT KRAUSS, .712, B. FRANK COOLEY.

